01:830:101 Lecture Notes - Lecture 2: Central Nervous System, Peripheral Nervous System, Axon Terminal

• School: Rutgers University
• Department: Psychology
• Course: 01:830:101
• Professor: Dr.John Ackroff

Document Summary

Franz gall developed the false theory called phrenology where bumps on the head dictate personality and intelligence. But the theory did direct our attention to brain region and function: psychologists that study these connections between biology and behavior are called biological. Neural communication: our neural system is basically made up of nerve cells or neurons. Dendrites ~ message receiving fibers and axons ~ message sending fibers which are insulated by the myelin sheath ~ fatty cells that help \speed up impulses. Impulses or action potential is a brief electrical charge that travels down the axon as it becomes. Depolarized due to the movement of positively charged ions entering the axon. After the transmission, the axon becomes polarized as positive ions are pumped out during the refractory. Period: the intensity of a stimulus is called the threshold. A stimulus must exceed the threshold in order for a trans(cid:373)issio(cid:374) to o(cid:272)(cid:272)ur. The (cid:374)euro(cid:374) will either fire or it wo(cid:374)"t.